Electrical Machines What is/are the advantages of parallel operation of alternators? continuity supply is maintained All of these Increase efficiency under light load conditions Increase in reliability continuity supply is maintained All of these Increase efficiency under light load conditions Increase in reliability ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Series booster is a series wound DC generator. shunt wound DC generator. separately excited DC generator. permanent magnet DC generator. series wound DC generator. shunt wound DC generator. separately excited DC generator. permanent magnet DC generator. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The no load and full load speed of DC motor are 1400 rpm and 1200 rpm respectively. What is the percentage speed regulation of the motor ? 16.67%. 14.28%. 15.30%. 18.25%. 16.67%. 14.28%. 15.30%. 18.25%. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 400 V, 50 Hz, 30 Hp, three phase IM is drawing 50 A current at 0.8 p.f lagging. The stator and rotor copper losses are 1.5 KW and 900 W respectively. The friction and windage losses are 1050 W and core losses are 1200 W. The air gap power of the motor will be 23.06 kW. 24.11 kW. 26.21 kW. 25 kW. 23.06 kW. 24.11 kW. 26.21 kW. 25 kW. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A large series motor is never started without some mechanical load on it because otherwise it will open fuse or circuit breaker. produce sparking at brushes. develop excessive speed and damage itself. draw too much current. open fuse or circuit breaker. produce sparking at brushes. develop excessive speed and damage itself. draw too much current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A generator may loose residual magnetism due to heating. any of these. vibrations. over excitation. heating. any of these. vibrations. over excitation. ANSWER DOWNLOAD EXAMIANS APP
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